Multipurpose utility for managing Games for Windows - LIVE installs and content. (Mirrored from https://github.com/InvoxiPlayGames/GfWLUtility)
invoxiplaygames.uk
1using System;
2using System.Collections.Generic;
3using System.IO;
4using System.Linq;
5using System.Text;
6using System.Windows.Forms;
7
8namespace GfWLUtility
9{
10 internal class DomainBlock
11 {
12 private static string hosts_file_path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.System), "drivers\\etc\\hosts");
13
14 public static bool IsDomainBlocked(string domain)
15 {
16 if (!File.Exists(hosts_file_path)) return false;
17
18 // scan through each entry in the hosts file to see if the block exists
19 string[] hosts_lines = File.ReadAllLines(hosts_file_path);
20 foreach (string entry in hosts_lines)
21 {
22 // ignore any entry starting with a comment, or any blank lines
23 if (entry.Length == 0 || entry[0] == '#') continue;
24 // to check if it's blocked, we see if it's routed nowhere or locally
25 // GfWL doesn't support IPv6 so we don't care for that either
26 if (entry.StartsWith("0.0.0.0") || entry.StartsWith("127.0.0.1"))
27 {
28 // would split but splitting is hard so we just see if the line contains the domain
29 if (entry.Contains(domain)) return true;
30 }
31 }
32
33 return false;
34 }
35
36 public static void BlockDomain(string domain)
37 {
38 if (!Program.Elevated)
39 throw new Exception("Blocking domains requires admin.");
40
41 // scan through each entry in the hosts file to see if the block exists
42 string[] hosts_lines = File.ReadAllLines(hosts_file_path);
43 List<string> hosts_lines_list = hosts_lines.ToList();
44 foreach (string entry in hosts_lines)
45 {
46 // ignore any entry starting with a comment, or any blank lines
47 if (entry.Length == 0 || entry[0] == '#') continue;
48 // to check if it's blocked, we see if it's routed nowhere or locally
49 // GfWL doesn't support IPv6 so we don't care for that either
50 if (entry.StartsWith("0.0.0.0") || entry.StartsWith("127.0.0.1"))
51 {
52 // would split but splitting is hard so we just see if the line contains the domain
53 if (entry.Contains(domain)) return;
54 }
55 }
56
57 // if we got here the domain isn't blocked already so add it
58 hosts_lines_list.Add($"0.0.0.0 {domain}");
59 File.WriteAllLines(hosts_file_path, hosts_lines_list.ToArray());
60 }
61
62 public static void UnblockDomain(string domain)
63 {
64 if (!Program.Elevated)
65 throw new Exception("Unblocking domains requires admin.");
66
67 // scan through each entry in the hosts file to see if the block exists
68 string[] hosts_lines = File.ReadAllLines(hosts_file_path);
69 List<string> hosts_lines_list = hosts_lines.ToList();
70 foreach (string entry in hosts_lines)
71 {
72 // ignore any entry starting with a comment, or any blank lines
73 if (entry.Length == 0 || entry[0] == '#') continue;
74 // to check if it's blocked, we see if it's routed nowhere or locally
75 // GfWL doesn't support IPv6 so we don't care for that either
76 if (entry.StartsWith("0.0.0.0") || entry.StartsWith("127.0.0.1"))
77 {
78 // would split but splitting is hard so we just see if the line contains the domain
79 // and then we remove the line from the hosts file
80 if (entry.Contains(domain))
81 hosts_lines_list.Remove(entry);
82 }
83 }
84 // write the newly modified hosts file back to the hosts file
85 File.WriteAllLines(hosts_file_path, hosts_lines_list.ToArray());
86 }
87 }
88}